Light unit.



A. D. NASH.

LIGHT UNIT.

APPLICATION r1150 MAR. 24. 1915.

Patented Aug. 24, 1915.

l/VI/E/V TOR glas Nash rfhur Dou A TTOR/VEYS LIGHT UNIT.

Specification of Letters Patent.

Patented Aug. 24, 1915.

Application filed March 24, 1915. Serial No. 16,778.

To all whom it may concern:

Be it known that I, ARTHUR DOUGLAS NASH, a citizen of the United States, and a resident-of the city of New York, Flushing, borough of Queens, in the county of Queens and State of New York, have invented a new and Improved Light Unit, of which the following is a full, clear, and exact description. The invention relates to electric lighting and its object is to provide a light unit which includes an electric lamp and a deco-' rative covering such as a globe containing the bulb of the electric light and having its neck detachably connected with an extension of the base of the lamp adjacent the bulb to leave the usual screw-threaded shank of the base wholly unobstructed for attachment to a socket.

In order to accomplish the desired result, use is made of an electric lamp having a bulb and a base, the base having an outer portion adapted to be fastened in a socket and having an extension adjacent thebulb, and a decorative covering having a neck for the passage of the bulb interiorly of the decorative casing, the neck of the latter fitting on and being secured to the said base extension of the electric lamp.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in

which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a side elevation of the electric lamp; Fig. 2 is a side elevation of the light unit as applied and with the decorative covering shown in section, a portion-of the attaching socket being also shown in section; Fig. 3 is a side elevation of a modified form of the electric lamp; Fig. 4 is a side elevation partly in section of a modified form of the light unit; and Fig. 5 is a reduced side elevation of a plurality of light units in position on a chandelier.

The light unit in its general construction consists of an electric lamp A and a decorative covering B, preferably in the form of a globe of decorative glass or other diaphanous material. 'The electric lamp A consists gaged by a collar G held on the neck B of the covering B. As shown in Figs. 1 and 2,

the enlarged portion D is exteriorly screwthreaded and the collar G is provided with an interior screw thread G screwing on the threaded portion D so as to securely fasten the decorative covering B to the electric lamp A to form a part thereof. It Will be noticed that the opening in the collar G is sufficiently large for the passage of the bulb G into the decorative covering B for the latter to'inclose the said bulb C, as plainly shown in Figs. 2 and 4. a

In order to limit the relative screwing movement of the collar G on the threaded portion D use is made of a limiting flange D fixed on the base D adjacent the upper end of the threaded portion D so that when the collar G is screwed up on the threaded portion D the collar G finally abuts against the flange D. It will be noticed that by this arrangement the covering B is held against being screwed up too far and the bottom of the bulb C is prevented from contact with the bottom of the covering B.

Instead of fastening the decorative cover" ing B to the lamp A as described and shown in Figs. 1 and 2, use maybe made of the construction illustrated in Figs. 3 and 4. In this case the base D of the electric lamp A is provided with the threaded portion I) adapted to screw into the socket F, and the base is further provided with an enlarged extension D provided at diametrically'opposite sides with bayonet slots D adapted to be engaged by lugs G struck-up on the inner side of the collar G held on the neck B. of the decorative covering B. By the arrangement described the decorative covering B can be readily placed in position over the bulb C and fastened in position on the extension D by engaging the lugs G with the bayonet slots D in the usual way. I do not limit myself to the construction shown and ing B to the electric lamp C, as the same may be varied without deviating from my in vention. V

It will be noticed that by the arrangement described, the decorative covering B and the electric lamp A form a light unit which can be readily screwed in any socket F, for instance, as shown in Fig. 5, a number of light units are screwed into sockets F held on a chandelier ring II. It will also be noticed that in a case of this kind a decorative covdescribed for fastening the decorative coverering could not well be attached to the chandelier, but with myimproved construction it is only necessary to screw the light unit in. position 1n the socket F of the chandelier.

If desired, the decorat ve covering B may .be of colored glass with suitable designs, or

described, no separate fixtures are requiredfor holding the globe in place, and the electric lamp and the globe form a unitary structure which can be readily placed in position in a lighting fixture by merely screwing the threaded base portion D (or D) in the socket of the lighting fixture.

Having .thus described my invention, I claim as new and desire to secure by Letters Patent:

1. A light unit, comprising an electric lamp having a bulb and a base, the base having an integral outer portion adapted to be fastened in a socket and having an extension adjacent the bulb, and a decorative covering adapted to inclose the said lamp bulb and having a neck provided with a metallic collar fitting exteriorly on and being secured to the said base extension of the electric lamp.

2. A light unit, comprising an electric A lamp having a bulb and a base, the base having an integral outer threaded portion adapted to screw into a lamp socket and having an enlarged exteriorly threaded integral extension adjacent the bulb, and a globe having a neck for the passage of the said lamp bulb into the globe, the neck having a threaded collar screwing exteriorly onto the said threaded extension to unite the globe and the lamp. 1

3. A light unit, comprising an electric lamp having a having an outer threaded portion to screw into a lamp socket and having an enlarged exteriorly threaded extension adjacent the bulb and a globe of diaphanous decorative material and having a neck for the passage of the said lamp bulb mto the globe for the latter to inclose the bulb, the

said neck having fastened thereto a metallic collar provided with an interior screwthread screwing, on the said lamp base extension.

4. A light unit, comprising an electric lamp having a bulb and a base, the base having an outer integral portion adaptedto be fastened in a socket and having an integral extension adjacent the bulb, a decorative.

lamp having a bulb and a base, the base having an outer threaded portion adapted to screw into a lamp socket and having an enlarged exteriorly threaded extension adjacent the bulb, a globe of a diaphanous dcorative material and having a neck for the passage'of the said lamp bulb into the globe for the latter to inclose the bulb, the said neck having fastened thereto a metallic collar provided with an interior screw thread screwing on the said lamp base extension, and a limiting flange integral on the base adjacent the said extension and adapted to be seated on the said metallic collar.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ARTHUR DOUGLAS NASH.

Witnesses: THEO. G. Hos'rER, GEORGE H. EMSLIE.

bulb and a base, the base adapted- 

